Question

An object is placed 21 cm in front of a concave mirror of radius of curvature 10 cm. A
glass slab of thickness 3 cm and refractive index 1.5 is placed close to the mirror in the
space between the object and the mirror. Find the position of the final image formed. Take
the distance of the near surface of the slab from the mirror to be 1 cm. (See Lesson 20)​

Answer 1

Answer:

The distance of the nearer surface of the slab from the mirror is 10 cm. Thus the rays faling on the concave mirror are diverging from P1 which is at 21 cm -1=20 cm from the mirror. But the radius of curvature is also 20 cm, hence P1 is at teh centre